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Questions & Answers
Will this fit on an AR-15 Manufacturer Answer

All mil-spec picatinny rails will be a fit. Thank you for your question.

by Nightstick, Manufacturer, October 17, 2025
Will this light fit a Glock 34 Expert Answer

Yes, it will.

by Kurt Colbourne, Gear Expert, April 15, 2021
Customer Reviews
Helpful Positive Review
Nice for the price by NMDave, April 8, 2018
Super bright, and easy to install. Just wish it was a simpler on/off switch, but overall great for the money. Tried it in the middle of the night in my house to see how it really was in total darkness and it lit up pretty much the entire open downs...
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5/5 found this helpful
Most Recent Reviews
great product by AMQ, Verified Owner, December 24, 2024
Great light. Nicely weighted and well made. Recommended.
Most Recent Reviews
Excellent weapon light by Retiredsailor, Verified Owner, November 7, 2024
Extremely flexible light for most firearms. I have two of this model.
Most Recent Reviews
Excellent weapon light by Retiredsailor, Verified Owner, November 5, 2024
This is my second light of this model. I have one mounted on a S&W M&P 15-22 Pistol and on a Ruger LC 10mm. Compact, but bright.
Most Recent Reviews
Haven’t had a chance to really play with it yet, but it looks and feels well built. It’s a little chonky, and will most likely stick out past the muzzle, so maybe not the best for discrete carrying. Probably better for home defense, or if you’ve got ...
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Most Recent Reviews
solid light by Tom, Verified Owner, March 2, 2024
It’s heavy, well built. The only downside is that the retaining screw keeps loosening it up. One thing I don’t understand is that why weapon light manufacturers keep using the Flat-head coin type of screw. They’re stripped easy, and you hardly can fi...
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Read All 8 Reviews
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Product Info for Nightstick Metal Weapon-Mounted Light - Non-Rechargeable, 850 Lumens

The Nightstick TWM-850XL Xtreme Lumens Tactical Weapon Mounted Light uses a CREE LED rated 850 lumens working in conjunction with a high efficiency deep parabolic reactor to reate a usable beam of light rated at 245 meters. This weapon light features a unique and completely ambidextrous Dual Dependent Toggle switch on each side of the light to operate the momentary-on and constant-on lighting modes. The housing of the TWM-850XL is constructed from aircraft grade 6061-T6 aluminum with a glass-filled nylon polymer battery door and toggle switches. Includes 4 sets of cross-rail inserts.image

WARNING: California`s Proposition 65

Specifications for Nightstick Metal Weapon-Mounted Light - Non-Rechargeable, 850 Lumens:

Manufacturer: Nightstick
Light Output: 850 lumens
Bulb Type: LED
Battery Type: CR123
Beam Color: White
Color: Black
Beam Distance: 245 m
Length: 3.75 in
Weight: 5.4 oz
Finish: Type III Hard Anodized
Additional Features: Super-bright Xtreme Lumens design, Ambidextrous toggle switch, Sharp focused beam for distance illumination, Serialized for personal identification
Gun Type: Pistol
Flashlight Application: Hunting, Tactical
Fabric/Material: 6061-T6 Aluminum
Light Source: LED
Water Resistance Level: IPX-7

Features of Nightstick Metal Weapon-Mounted Light - Non-Rechargeable, 850 Lumens

  • Super-bright Xtreme Lumens design.
  • CREE LED technology - 50,000 + hours LED life.
  • Ambidextrous toggle switch.
  • Momentary or constant-on modes.
  • Sharp focused beam for distance illumination.
  • Aircraft-grade 6061-T6 aluminum housing.
  • Glass-filled nylon polymer toggle switch.
  • Type III hard anodized finish.
  • Beam distance rated at 245 meters.
  • Waterproof IPX-7.
  • Impact resistant to 2 meters.
  • Chemical resistant.
  • Serialized for identification.
  • Powered by 2 CR123 Lithium batteries (included).
  • Includes 4 Sets of Cross-Rail Inserts (2 inserts each to fit GLOCK, 1913, TSW/99, 90two), 4 Cross-Rail Mounting Cap Head Screws, Allen Wrench.
  • Limited Lifetime Warranty.

Package Contents:

  • Nightstick Metal Weapon-Mounted Light - Non-Rechargeable, 850 Lumens

Nightstick Metal Weapon-Mounted Light - Non-Rechargeable, 850 Lumens Orderable Models

List of Orderable Models

  • Nightstick Metal Weapon-Mounted Light - Non-Rechargeable, 850 lumens, Black, TWM-850XL , MPN: TWM-850XL , UPC: 017398805438 , Code: 28X-FLW-XLMWMLLA-TWM-850XL
  • Nightstick Metal Weapon-Mounted Light - Non-Rechargeable, 850 lumens, w/Strobe, Black, TWM-850XLS , MPN: TWM-850XLS , UPC: 017398805599 , Code: 28X-FLW-XLMWMLLA-TWM-850XLS

Nightstick Metal Weapon-Mounted Light - Non-Rechargeable, 850 Lumens Unavailable & Discontinued Models

List of Unorderable Models

  • Nightstick Xtreme Lumens Metal Weapon-Mounted Light with Strobe - Non-Rechargeable, Black, TWM-350XLS , MPN: TWM-350XLS , Code: 28X-FLW-XLMWMLLA-TWM-350XLS
  • Nightstick Xtreme Lumens Metal Weapon-Mounted Light - Non-Rechargeable, Black, TWM-350XL , MPN: TWM-350XL , Code: 28X-FLW-XLMWMLLA-TWM-350XL
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